import { getRouters } from '@/api/menu'
import router, { constantRoutes, dynamicRoutes } from "@/router/index"
import Layout from '@/layout/index'
import ParentView from '@/components/ParentView'
import InnerLink from '@/layout/components/InnerLink'
const permission = {
    state: {
        routes: [],
        addRoutes: [],
        defaultRoutes: [],
        topbarRouters: [],
        sidebarRouters: []
    },
    mutations: {
        SET_ROUTES: (state, routes) => {
            state.addRoutes = routes
            state.routes = constantRoutes.concat(routes)
        },
        SET_DEFAULT_ROUTES: (state, routes) => {
            state.defaultRoutes = constantRoutes.concat(routes)
        },
        SET_TOPBAR_ROUTES: (state, routes) => {
            state.topbarRouters = routes
        },
        SET_SIDEBAR_ROUTERS: (state, routes) => {
            state.sidebarRouters = routes
        },
    },
    actions: {
        // 生成路由
        GenerateRoutes({ commit }) {
            return new Promise(resolve => {
                // 向后端请求路由数据
                getRouters().then(res => {
                    const sdata = JSON.parse(JSON.stringify(res.data))
                    const rdata = JSON.parse(JSON.stringify(res.data))
                    console.log('sdata:', sdata)
                    const sidebarRoutes = filterAsyncRouter(sdata)
                    const rewriteRoutes = filterAsyncRouter(rdata)
                    console.log('sidebarRoutes:', sidebarRoutes)
                    // const asyncRoutes = filterDynamicRoutes(dynamicRoutes);
                    rewriteRoutes.push({ path: '*', redirect: '/404', hidden: true })
                    // router.addRoutes(asyncRoutes);
                    commit('SET_ROUTES', rewriteRoutes)
                    commit('SET_SIDEBAR_ROUTERS', constantRoutes.concat(sidebarRoutes))
                    commit('SET_DEFAULT_ROUTES', sidebarRoutes)
                    commit('SET_TOPBAR_ROUTES', sidebarRoutes)
                    resolve(rewriteRoutes)
                })
            })
        }
    }
}
// 遍历后台传来的路由字符串，转换为组件对象
function filterAsyncRouter(asyncRouterMap) {
    const accessedRouters =  asyncRouterMap.filter(route => {
        if (route.children && route.children.length) {
            route.children.forEach(child => {
                child.path = route.path + '/' + child.path
            })
            route.children = filterAsyncRouter(route.children)
        }
        if (route.component) {
            // Layout ParentView 组件特殊处理
            if (route.component === 'Layout') {
                route.component = Layout
            } else if (route.component === 'ParentView') {
                route.component = ParentView
              } else if (route.component === 'InnerLink') {
                route.component = InnerLink
              } else {
                route.component = loadView(route.component)
              }
        }
        return true
    })
    return accessedRouters
}

function filterChildren(childrenMap, lastRouter = false) {
    var children = []
    childrenMap.forEach((el, index) => {
        if (el.children && el.children.length) {
            if (el.component === 'ParentView' && !lastRouter) {
                el.children.forEach(c => {
                    c.path = el.path + '/' + c.path
                    if (c.children && c.children.length) {
                        children = children.concat(filterChildren(c.children, c))
                        return
                    }
                    children.push(c)
                })
                return
            }
        }
        if (lastRouter) {
            el.path = lastRouter.path + '/' + el.path
        }
        children = children.concat(el)
    })
    return children
}

// 动态路由遍历，验证是否具备权限
export function filterDynamicRoutes(routes) {
    const res = []
    routes.forEach(route => {
        if (route.permissions) {
            if (auth.hasPermiOr(route.permissions)) {
                res.push(route)
            }
        } else if (route.roles) {
            if (auth.hasRoleOr(route.roles)) {
                res.push(route)
            }
        }
    })
    return res
}
// 路由懒加载
export const loadView = (view) => {
    return () => import(`@/views/${view}`)
}
export default permission